21084413

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{641}}^1$

素因数の和:812

約数の個数: 16

約数和(自身を含む): 24981504

約数和(自身を除く): 3897091

約数列:

[1, 7, 37, 127, 259, 641, 889, 4487, 4699, 23717, 32893, 81407, 166019, 569849, 3012059, 21084413]

約数ペア:

[(1, 21084413), (7, 3012059), (37, 569849), (127, 166019), (259, 81407), (641, 32893), (889, 23717), (4487, 4699)]